1. The use of pulses
Register %MB3.9809 controls the sending and
receiving of pulses from the 0 to 3 axis ports：
When the corresponding bit value for each axis 0 to 3 is
1 (example: change the value of %MB3.9809 to 15, i.e.
"1111"), the pulse receiving pins of the 0 to 3 axis port of the
VA controller hardware will change to pulse sending
(corresponding to 5 to 8 axes respectively in software). Up
to 8 axes (0 to 3, 5 to 8) can be pulsed.
When the corresponding bit value of each axis 0 to 3 is
0 (example: change the value of %MB3.9809 to 0, i.e.
"0000"), the 0 to 3 axes will be able to send and receive
pulses.
Caution：
(1) The last axis port on the hardware receives pulses
only.
(2) The last axis port on the hardware is axis 4 on the
software.
2. Use of analogue quantities
(1) Only analog quantities (AO0~AO3)
can be sent from axes 0~3, and motion control
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